Dr. Crusher falls under the spell of a mysterious entity on her grandmother's world.
Dr. Crusher goes to Caldos IV to attend her grandmother's funeral, and finds that her family has a mysterious history. She discovers that the women in her family have long been involved with a mysterious presence in the shape of a man named Ronin. She begins a romance with him, and becomes obsessed.
The story is a gothic romance with a science-fiction twist, and it is notable for its eerie atmosphere. The ship's doctor is placed at the center of a supernatural puzzle, and Data and Geordi work to find out the truth. The episode has a divided reputation among fans, but its mood and visuals are striking.